Teensy 3 Midi Din to CV out

I don’t usually mix my micro controller obsessions with my music making, but a friend gave me Korg Monotron analogue synth as a present, and I really love the filter it has. However, I want to be able to combine the lovely synth sounds it can produce with a keyboard and arpeggiator. So, how about hooking it up to receive Midi signals through a DIN connector.

Here the sound after the hard work:

And here is the page describing the setup: